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Diffstat (limited to 'arch/ppc64/kernel/pSeries_lpar.c')
-rw-r--r--arch/ppc64/kernel/pSeries_lpar.c517
1 files changed, 0 insertions, 517 deletions
diff --git a/arch/ppc64/kernel/pSeries_lpar.c b/arch/ppc64/kernel/pSeries_lpar.c
deleted file mode 100644
index 268d8362dde..00000000000
--- a/arch/ppc64/kernel/pSeries_lpar.c
+++ /dev/null
@@ -1,517 +0,0 @@
-/*
- * pSeries_lpar.c
- * Copyright (C) 2001 Todd Inglett, IBM Corporation
- *
- * pSeries LPAR support.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define DEBUG
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/dma-mapping.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/machdep.h>
-#include <asm/abs_addr.h>
-#include <asm/mmu_context.h>
-#include <asm/ppcdebug.h>
-#include <asm/iommu.h>
-#include <asm/tlbflush.h>
-#include <asm/tlb.h>
-#include <asm/prom.h>
-#include <asm/abs_addr.h>
-#include <asm/cputable.h>
-#include <asm/plpar_wrappers.h>
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-/* in pSeries_hvCall.S */
-EXPORT_SYMBOL(plpar_hcall);
-EXPORT_SYMBOL(plpar_hcall_4out);
-EXPORT_SYMBOL(plpar_hcall_norets);
-EXPORT_SYMBOL(plpar_hcall_8arg_2ret);
-
-extern void pSeries_find_serial_port(void);
-
-
-int vtermno; /* virtual terminal# for udbg */
-
-#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
-static void udbg_hvsi_putc(unsigned char c)
-{
- /* packet's seqno isn't used anyways */
- uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c };
- int rc;
-
- if (c == '\n')
- udbg_hvsi_putc('\r');
-
- do {
- rc = plpar_put_term_char(vtermno, sizeof(packet), packet);
- } while (rc == H_Busy);
-}
-
-static long hvsi_udbg_buf_len;
-static uint8_t hvsi_udbg_buf[256];
-
-static int udbg_hvsi_getc_poll(void)
-{
- unsigned char ch;
- int rc, i;
-
- if (hvsi_udbg_buf_len == 0) {
- rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf);
- if (rc != H_Success || hvsi_udbg_buf[0] != 0xff) {
- /* bad read or non-data packet */
- hvsi_udbg_buf_len = 0;
- } else {
- /* remove the packet header */
- for (i = 4; i < hvsi_udbg_buf_len; i++)
- hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i];
- hvsi_udbg_buf_len -= 4;
- }
- }
-
- if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) {
- /* no data ready */
- hvsi_udbg_buf_len = 0;
- return -1;
- }
-
- ch = hvsi_udbg_buf[0];
- /* shift remaining data down */
- for (i = 1; i < hvsi_udbg_buf_len; i++) {
- hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i];
- }
- hvsi_udbg_buf_len--;
-
- return ch;
-}
-
-static unsigned char udbg_hvsi_getc(void)
-{
- int ch;
- for (;;) {
- ch = udbg_hvsi_getc_poll();
- if (ch == -1) {
- /* This shouldn't be needed...but... */
- volatile unsigned long delay;
- for (delay=0; delay < 2000000; delay++)
- ;
- } else {
- return ch;
- }
- }
-}
-
-static void udbg_putcLP(unsigned char c)
-{
- char buf[16];
- unsigned long rc;
-
- if (c == '\n')
- udbg_putcLP('\r');
-
- buf[0] = c;
- do {
- rc = plpar_put_term_char(vtermno, 1, buf);
- } while(rc == H_Busy);
-}
-
-/* Buffered chars getc */
-static long inbuflen;
-static long inbuf[2]; /* must be 2 longs */
-
-static int udbg_getc_pollLP(void)
-{
- /* The interface is tricky because it may return up to 16 chars.
- * We save them statically for future calls to udbg_getc().
- */
- char ch, *buf = (char *)inbuf;
- int i;
- long rc;
- if (inbuflen == 0) {
- /* get some more chars. */
- inbuflen = 0;
- rc = plpar_get_term_char(vtermno, &inbuflen, buf);
- if (rc != H_Success)
- inbuflen = 0; /* otherwise inbuflen is garbage */
- }
- if (inbuflen <= 0 || inbuflen > 16) {
- /* Catch error case as well as other oddities (corruption) */
- inbuflen = 0;
- return -1;
- }
- ch = buf[0];
- for (i = 1; i < inbuflen; i++) /* shuffle them down. */
- buf[i-1] = buf[i];
- inbuflen--;
- return ch;
-}
-
-static unsigned char udbg_getcLP(void)
-{
- int ch;
- for (;;) {
- ch = udbg_getc_pollLP();
- if (ch == -1) {
- /* This shouldn't be needed...but... */
- volatile unsigned long delay;
- for (delay=0; delay < 2000000; delay++)
- ;
- } else {
- return ch;
- }
- }
-}
-
-/* call this from early_init() for a working debug console on
- * vterm capable LPAR machines
- */
-void udbg_init_debug_lpar(void)
-{
- vtermno = 0;
- udbg_putc = udbg_putcLP;
- udbg_getc = udbg_getcLP;
- udbg_getc_poll = udbg_getc_pollLP;
-}
-
-/* returns 0 if couldn't find or use /chosen/stdout as console */
-int find_udbg_vterm(void)
-{
- struct device_node *stdout_node;
- u32 *termno;
- char *name;
- int found = 0;
-
- /* find the boot console from /chosen/stdout */
- if (!of_chosen)
- return 0;
- name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
- if (name == NULL)
- return 0;
- stdout_node = of_find_node_by_path(name);
- if (!stdout_node)
- return 0;
-
- /* now we have the stdout node; figure out what type of device it is. */
- name = (char *)get_property(stdout_node, "name", NULL);
- if (!name) {
- printk(KERN_WARNING "stdout node missing 'name' property!\n");
- goto out;
- }
-
- if (strncmp(name, "vty", 3) == 0) {
- if (device_is_compatible(stdout_node, "hvterm1")) {
- termno = (u32 *)get_property(stdout_node, "reg", NULL);
- if (termno) {
- vtermno = termno[0];
- udbg_putc = udbg_putcLP;
- udbg_getc = udbg_getcLP;
- udbg_getc_poll = udbg_getc_pollLP;
- found = 1;
- }
- } else if (device_is_compatible(stdout_node, "hvterm-protocol")) {
- termno = (u32 *)get_property(stdout_node, "reg", NULL);
- if (termno) {
- vtermno = termno[0];
- udbg_putc = udbg_hvsi_putc;
- udbg_getc = udbg_hvsi_getc;
- udbg_getc_poll = udbg_hvsi_getc_poll;
- found = 1;
- }
- }
- } else if (strncmp(name, "serial", 6)) {
- /* XXX fix ISA serial console */
- printk(KERN_WARNING "serial stdout on LPAR ('%s')! "
- "can't print udbg messages\n",
- stdout_node->full_name);
- } else {
- printk(KERN_WARNING "don't know how to print to stdout '%s'\n",
- stdout_node->full_name);
- }
-
-out:
- of_node_put(stdout_node);
- return found;
-}
-
-void vpa_init(int cpu)
-{
- int hwcpu = get_hard_smp_processor_id(cpu);
- unsigned long vpa = (unsigned long)&(paca[cpu].lppaca);
- long ret;
- unsigned long flags;
-
- /* Register the Virtual Processor Area (VPA) */
- flags = 1UL << (63 - 18);
-
- if (cpu_has_feature(CPU_FTR_ALTIVEC))
- paca[cpu].lppaca.vmxregs_in_use = 1;
-
- ret = register_vpa(flags, hwcpu, __pa(vpa));
-
- if (ret)
- printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
- "cpu %d (hw %d) of area %lx returns %ld\n",
- cpu, hwcpu, __pa(vpa), ret);
-}
-
-long pSeries_lpar_hpte_insert(unsigned long hpte_group,
- unsigned long va, unsigned long prpn,
- unsigned long vflags, unsigned long rflags)
-{
- unsigned long lpar_rc;
- unsigned long flags;
- unsigned long slot;
- unsigned long hpte_v, hpte_r;
- unsigned long dummy0, dummy1;
-
- hpte_v = ((va >> 23) << HPTE_V_AVPN_SHIFT) | vflags | HPTE_V_VALID;
- if (vflags & HPTE_V_LARGE)
- hpte_v &= ~(1UL << HPTE_V_AVPN_SHIFT);
-
- hpte_r = (prpn << HPTE_R_RPN_SHIFT) | rflags;
-
- /* Now fill in the actual HPTE */
- /* Set CEC cookie to 0 */
- /* Zero page = 0 */
- /* I-cache Invalidate = 0 */
- /* I-cache synchronize = 0 */
- /* Exact = 0 */
- flags = 0;
-
- /* XXX why is this here? - Anton */
- if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
- hpte_r &= ~_PAGE_COHERENT;
-
- lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v,
- hpte_r, &slot, &dummy0, &dummy1);
-
- if (unlikely(lpar_rc == H_PTEG_Full))
- return -1;
-
- /*
- * Since we try and ioremap PHBs we don't own, the pte insert
- * will fail. However we must catch the failure in hash_page
- * or we will loop forever, so return -2 in this case.
- */
- if (unlikely(lpar_rc != H_Success))
- return -2;
-
- /* Because of iSeries, we have to pass down the secondary
- * bucket bit here as well
- */
- return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
-}
-
-static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
-
-static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
-{
- unsigned long slot_offset;
- unsigned long lpar_rc;
- int i;
- unsigned long dummy1, dummy2;
-
- /* pick a random slot to start at */
- slot_offset = mftb() & 0x7;
-
- for (i = 0; i < HPTES_PER_GROUP; i++) {
-
- /* don't remove a bolted entry */
- lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
- (0x1UL << 4), &dummy1, &dummy2);
-
- if (lpar_rc == H_Success)
- return i;
-
- BUG_ON(lpar_rc != H_Not_Found);
-
- slot_offset++;
- slot_offset &= 0x7;
- }
-
- return -1;
-}
-
-static void pSeries_lpar_hptab_clear(void)
-{
- unsigned long size_bytes = 1UL << ppc64_pft_size;
- unsigned long hpte_count = size_bytes >> 4;
- unsigned long dummy1, dummy2;
- int i;
-
- /* TODO: Use bulk call */
- for (i = 0; i < hpte_count; i++)
- plpar_pte_remove(0, i, 0, &dummy1, &dummy2);
-}
-
-/*
- * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
- * the low 3 bits of flags happen to line up. So no transform is needed.
- * We can probably optimize here and assume the high bits of newpp are
- * already zero. For now I am paranoid.
- */
-static long pSeries_lpar_hpte_updatepp(unsigned long slot, unsigned long newpp,
- unsigned long va, int large, int local)
-{
- unsigned long lpar_rc;
- unsigned long flags = (newpp & 7) | H_AVPN;
- unsigned long avpn = va >> 23;
-
- if (large)
- avpn &= ~0x1UL;
-
- lpar_rc = plpar_pte_protect(flags, slot, (avpn << 7));
-
- if (lpar_rc == H_Not_Found)
- return -1;
-
- BUG_ON(lpar_rc != H_Success);
-
- return 0;
-}
-
-static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
-{
- unsigned long dword0;
- unsigned long lpar_rc;
- unsigned long dummy_word1;
- unsigned long flags;
-
- /* Read 1 pte at a time */
- /* Do not need RPN to logical page translation */
- /* No cross CEC PFT access */
- flags = 0;
-
- lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
-
- BUG_ON(lpar_rc != H_Success);
-
- return dword0;
-}
-
-static long pSeries_lpar_hpte_find(unsigned long vpn)
-{
- unsigned long hash;
- unsigned long i, j;
- long slot;
- unsigned long hpte_v;
-
- hash = hpt_hash(vpn, 0);
-
- for (j = 0; j < 2; j++) {
- slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
- for (i = 0; i < HPTES_PER_GROUP; i++) {
- hpte_v = pSeries_lpar_hpte_getword0(slot);
-
- if ((HPTE_V_AVPN_VAL(hpte_v) == (vpn >> 11))
- && (hpte_v & HPTE_V_VALID)
- && (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
- /* HPTE matches */
- if (j)
- slot = -slot;
- return slot;
- }
- ++slot;
- }
- hash = ~hash;
- }
-
- return -1;
-}
-
-static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
- unsigned long ea)
-{
- unsigned long lpar_rc;
- unsigned long vsid, va, vpn, flags;
- long slot;
-
- vsid = get_kernel_vsid(ea);
- va = (vsid << 28) | (ea & 0x0fffffff);
- vpn = va >> PAGE_SHIFT;
-
- slot = pSeries_lpar_hpte_find(vpn);
- BUG_ON(slot == -1);
-
- flags = newpp & 7;
- lpar_rc = plpar_pte_protect(flags, slot, 0);
-
- BUG_ON(lpar_rc != H_Success);
-}
-
-static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
- int large, int local)
-{
- unsigned long avpn = va >> 23;
- unsigned long lpar_rc;
- unsigned long dummy1, dummy2;
-
- if (large)
- avpn &= ~0x1UL;
-
- lpar_rc = plpar_pte_remove(H_AVPN, slot, (avpn << 7), &dummy1,
- &dummy2);
-
- if (lpar_rc == H_Not_Found)
- return;
-
- BUG_ON(lpar_rc != H_Success);
-}
-
-/*
- * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
- * lock.
- */
-void pSeries_lpar_flush_hash_range(unsigned long number, int local)
-{
- int i;
- unsigned long flags = 0;
- struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
- int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
-
- if (lock_tlbie)
- spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
-
- for (i = 0; i < number; i++)
- flush_hash_page(batch->vaddr[i], batch->pte[i], local);
-
- if (lock_tlbie)
- spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
-}
-
-void hpte_init_lpar(void)
-{
- ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate;
- ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp;
- ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
- ppc_md.hpte_insert = pSeries_lpar_hpte_insert;
- ppc_md.hpte_remove = pSeries_lpar_hpte_remove;
- ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
- ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear;
-
- htab_finish_init();
-}
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